As seen in the above video, Buckingham and McVie led Fallon and his house band, the Roots, through a toy-fueled rendition of the Fleetwood Mac classic "Don't Stop," a Top 5 hit from the group's classic Rumours album that's gone on to become a pop anthem for listeners looking hopefully toward the future — which made the song a natural fit for Fallon's other special guests, a group of children from the SeriousFun Children's Network.

Uproxx notes that SeriousFun, founded by late actor Paul Newman to help children with serious illnesses through a number of initiatives — including camp programs — has been a favorite cause of Fallon's for some time; when he partnered with Ben & Jerry's to help create their Tonight Dough ice cream flavor, he donated his proceeds to the organization, raising more than $1 million over a two-year span.